[INFO] cloning repository https://github.com/kacper-marzecki/digital-ocean-cli
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kacper-marzecki/digital-ocean-cli" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkacper-marzecki%2Fdigital-ocean-cli", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkacper-marzecki%2Fdigital-ocean-cli'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7f4270a66e5a7729082f804fba1f03aa218d4cba
[INFO] checking kacper-marzecki/digital-ocean-cli against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkacper-marzecki%2Fdigital-ocean-cli" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kacper-marzecki/digital-ocean-cli on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kacper-marzecki/digital-ocean-cli
[INFO] finished tweaking git repo https://github.com/kacper-marzecki/digital-ocean-cli
[INFO] tweaked toml for git repo https://github.com/kacper-marzecki/digital-ocean-cli written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 786d19ebf1c4c1fab98cc5a94fd916927b6fab69a7a3a5f65a7fc98cece1e832
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "786d19ebf1c4c1fab98cc5a94fd916927b6fab69a7a3a5f65a7fc98cece1e832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "786d19ebf1c4c1fab98cc5a94fd916927b6fab69a7a3a5f65a7fc98cece1e832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "786d19ebf1c4c1fab98cc5a94fd916927b6fab69a7a3a5f65a7fc98cece1e832", kill_on_drop: false }`
[INFO] [stdout] 786d19ebf1c4c1fab98cc5a94fd916927b6fab69a7a3a5f65a7fc98cece1e832
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 613f89fd914cb54c00008d61cbcb61c147d78e0bcb16648ab18c255f3482422a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "613f89fd914cb54c00008d61cbcb61c147d78e0bcb16648ab18c255f3482422a", kill_on_drop: false }`
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[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DropletNetwork`, `DropletNetworks`
[INFO] [stdout]  --> src/core/mod.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::api::{Droplet, DropletNetwork, DropletNetworks, Droplets};
[INFO] [stdout]   |                           ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error as ReqError`
[INFO] [stdout]  --> src/core/mod.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use reqwest::{Error as ReqError, Method};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DropletNetwork`, `DropletNetworks`
[INFO] [stdout]  --> src/core/mod.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::api::{Droplet, DropletNetwork, DropletNetworks, Droplets};
[INFO] [stdout]   |                           ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error as ReqError`
[INFO] [stdout]  --> src/core/mod.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use reqwest::{Error as ReqError, Method};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0170]: pattern binding `Ubuntu` is named the same as one of the variants of the type `config::DropletImage`
[INFO] [stdout]   --> src/config/mod.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             Ubuntu => "ubuntu-18-04-x64",
[INFO] [stdout]    |             ^^^^^^ help: to match on the variant, qualify the path: `config::DropletImage::Ubuntu`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bindings_with_variant_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0170]: pattern binding `CoreOS` is named the same as one of the variants of the type `config::DropletImage`
[INFO] [stdout]   --> src/config/mod.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |             CoreOS => "coreos-stable",
[INFO] [stdout]    |             ^^^^^^ help: to match on the variant, qualify the path: `config::DropletImage::CoreOS`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/config/mod.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             Ubuntu => "ubuntu-18-04-x64",
[INFO] [stdout]    |             ------ matches any value
[INFO] [stdout] 29 |             CoreOS => "coreos-stable",
[INFO] [stdout]    |             ^^^^^^ unreachable pattern
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0170]: pattern binding `S1Cpu1Gb` is named the same as one of the variants of the type `config::DropletSize`
[INFO] [stdout]   --> src/config/mod.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             S1Cpu1Gb => "s-1vcpu-1gb",
[INFO] [stdout]    |             ^^^^^^^^ help: to match on the variant, qualify the path: `config::DropletSize::S1Cpu1Gb`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Ubuntu`
[INFO] [stdout]   --> src/config/mod.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             Ubuntu => "ubuntu-18-04-x64",
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_Ubuntu`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `CoreOS`
[INFO] [stdout]   --> src/config/mod.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |             CoreOS => "coreos-stable",
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_CoreOS`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `S1Cpu1Gb`
[INFO] [stdout]   --> src/config/mod.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             S1Cpu1Gb => "s-1vcpu-1gb",
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_S1Cpu1Gb`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `response`
[INFO] [stdout]   --> src/core/mod.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let response = api::call_do(
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_response`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/error/mod.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn from(err: std::io::Error) -> Self {
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/error/mod.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn from(err: serde_json::Error) -> Self {
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0170]: pattern binding `Ubuntu` is named the same as one of the variants of the type `config::DropletImage`
[INFO] [stdout]   --> src/config/mod.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             Ubuntu => "ubuntu-18-04-x64",
[INFO] [stdout]    |             ^^^^^^ help: to match on the variant, qualify the path: `config::DropletImage::Ubuntu`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bindings_with_variant_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0170]: pattern binding `CoreOS` is named the same as one of the variants of the type `config::DropletImage`
[INFO] [stdout]   --> src/config/mod.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |             CoreOS => "coreos-stable",
[INFO] [stdout]    |             ^^^^^^ help: to match on the variant, qualify the path: `config::DropletImage::CoreOS`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/config/mod.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             Ubuntu => "ubuntu-18-04-x64",
[INFO] [stdout]    |             ------ matches any value
[INFO] [stdout] 29 |             CoreOS => "coreos-stable",
[INFO] [stdout]    |             ^^^^^^ unreachable pattern
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0170]: pattern binding `S1Cpu1Gb` is named the same as one of the variants of the type `config::DropletSize`
[INFO] [stdout]   --> src/config/mod.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             S1Cpu1Gb => "s-1vcpu-1gb",
[INFO] [stdout]    |             ^^^^^^^^ help: to match on the variant, qualify the path: `config::DropletSize::S1Cpu1Gb`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Ubuntu`
[INFO] [stdout]   --> src/config/mod.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             Ubuntu => "ubuntu-18-04-x64",
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_Ubuntu`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `CoreOS`
[INFO] [stdout]   --> src/config/mod.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |             CoreOS => "coreos-stable",
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_CoreOS`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `S1Cpu1Gb`
[INFO] [stdout]   --> src/config/mod.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             S1Cpu1Gb => "s-1vcpu-1gb",
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_S1Cpu1Gb`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `response`
[INFO] [stdout]   --> src/core/mod.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let response = api::call_do(
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_response`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/error/mod.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn from(err: std::io::Error) -> Self {
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/error/mod.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn from(err: serde_json::Error) -> Self {
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `DropletImage`
[INFO] [stdout]   --> src/config/mod.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 | enum DropletImage {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `slug`
[INFO] [stdout]   --> src/config/mod.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn slug(&self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `DropletSize`
[INFO] [stdout]   --> src/config/mod.rs:35:6
[INFO] [stdout]    |
[INFO] [stdout] 35 | enum DropletSize {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `slug`
[INFO] [stdout]   --> src/config/mod.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn slug(&self) -> String {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ssh_authenticate`
[INFO] [stdout]    --> src/core/mod.rs:116:4
[INFO] [stdout]     |
[INFO] [stdout] 116 | fn ssh_authenticate(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 |     show_help();
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Ubuntu` should have a snake case name
[INFO] [stdout]   --> src/config/mod.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             Ubuntu => "ubuntu-18-04-x64",
[INFO] [stdout]    |             ^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ubuntu`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `CoreOS` should have a snake case name
[INFO] [stdout]   --> src/config/mod.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |             CoreOS => "coreos-stable",
[INFO] [stdout]    |             ^^^^^^ help: convert the identifier to snake case: `core_os`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S1Cpu1Gb` should have a snake case name
[INFO] [stdout]   --> src/config/mod.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             S1Cpu1Gb => "s-1vcpu-1gb",
[INFO] [stdout]    |             ^^^^^^^^ help: convert the identifier to snake case: `s1_cpu1_gb`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0170`.
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `DropletImage`
[INFO] [stdout]   --> src/config/mod.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 | enum DropletImage {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `slug`
[INFO] [stdout]   --> src/config/mod.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn slug(&self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `DropletSize`
[INFO] [stdout]   --> src/config/mod.rs:35:6
[INFO] [stdout]    |
[INFO] [stdout] 35 | enum DropletSize {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `slug`
[INFO] [stdout]   --> src/config/mod.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn slug(&self) -> String {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ssh_authenticate`
[INFO] [stdout]    --> src/core/mod.rs:116:4
[INFO] [stdout]     |
[INFO] [stdout] 116 | fn ssh_authenticate(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 |     show_help();
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Ubuntu` should have a snake case name
[INFO] [stdout]   --> src/config/mod.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             Ubuntu => "ubuntu-18-04-x64",
[INFO] [stdout]    |             ^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ubuntu`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `CoreOS` should have a snake case name
[INFO] [stdout]   --> src/config/mod.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |             CoreOS => "coreos-stable",
[INFO] [stdout]    |             ^^^^^^ help: convert the identifier to snake case: `core_os`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S1Cpu1Gb` should have a snake case name
[INFO] [stdout]   --> src/config/mod.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             S1Cpu1Gb => "s-1vcpu-1gb",
[INFO] [stdout]    |             ^^^^^^^^ help: convert the identifier to snake case: `s1_cpu1_gb`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0170`.
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 50s
[INFO] running `Command { std: "docker" "inspect" "613f89fd914cb54c00008d61cbcb61c147d78e0bcb16648ab18c255f3482422a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "613f89fd914cb54c00008d61cbcb61c147d78e0bcb16648ab18c255f3482422a", kill_on_drop: false }`
[INFO] [stdout] 613f89fd914cb54c00008d61cbcb61c147d78e0bcb16648ab18c255f3482422a